* Cancel enrollment. Check size after each step.
*/
public void testEnroll() throws Exception {
System.out.println("testEnroll: start...");
EnrollmentManager enrollmentManager = EnrollmentManager.getInstance();
ENCourseNode enNode = new ENCourseNode();
OLATResourceable ores = OresHelper.createOLATResourceableTypeWithoutCheck("TestCourse");
CourseEnvironment cenv = CourseFactory.createEmptyCourse(ores, "Test", "Test", "learningObjectives").getCourseEnvironment();
// 1. enroll wg1 user
IdentityEnvironment ienv = new IdentityEnvironment();
ienv.setIdentity(wg1);